how do 48 color lead arrange gradually change color

48 color lead have the permutation method which two kinds gradually change color:

1. rainbow arrangements: According to red, orange, yellow, green, blue, blue, purple, black, white, golden, silver color foreword permutation. In each a series of color chromaticity from to the weak permutation (note: Blue and the main source is a color. In the chromatics, the blue appearance is the green blue color).